Pulling jack



March 9 1926.

R. A. MAXEY PULLING JACK Filed Dec. 6. 1923 gumnk",

Patented Mar. 9, 1925.

UNITED STATES 1,576,204 PATENT OFFICE.

ROBERT a. lunar, or WILLIAMSON, WEST VIRGINIA.

.PULLING JACK.

Application filed December e, 1923. Serial No. 678,947.

To all whom it may concern:

Be it known that I, Ronnar A. MAXEY, a citizen of the United States, residing at VVilliamsom'in the county of Mingo and State of \Vest Virginia, have invented cer tain new and useful Improvements in Pulling J ack s, of which the following is a specification. I

This invention lias reference to a pulling jack adapted for all classes of structural work but used principally in repairing steel cars.

The object of the invention is to provide a \simple and-eflicient device for straightening either long or short pulls. Other important advantages of the Invention reside in the fact that it is ca able of being easily" handled, set up, or tall which it may be manipulated to exert a pulling force on the top of the car undergoing repairs.

lVith the above and other objects in view,

theinvention consists in the particular arrangement, construction, and combination of parts hereinafter more fully described and referred to in the accompanying drawing, wherein: I

Figure 1 is a. top plan'view of a steel car 7 showing the invention applied thereto.

Figure 2 is an enlarged view of the 1nvention, the cylinder being shown in section.

' Figure 3 is a detailed view of one. end of the jack, and

Figure 4 isa detailed view of the opposite end. Describing the invention in detail, 10 designates a conventional railway car of the steel car type, the same being stationary on track 11. The tie beams, which provlde the main support for the top of the car, are indicated at 12; Due to overloading and other causes, a majority of these cars, when turned in at the shop for repairs, are read apart at the top from six to eight 1110 ose-more or en apart and the ease with less, so that the tie beams become loosened and the device in use aft-tho present time for pulling in the top of the cars forthe purpose of replacing the tie beams is a screw puller used and operated by hand in a very slow and inconvenient manner. By the employment of a device constructed in'accord ance with the present invention, however, it is possible to replace the tie beams much more quickly than has beenhcretofore ossible, in addition to making the work lig ter and less inconvenient.

in which the barrel 13 has the cylinder heads 14 and 15 suitably fastened to each end thereof. Cylinder head 14 is provided with a,

ring 16 spaced outwardly from the outer face of the cylinder head formed integral therewith, as shown at 17 To the ring 16 is adapted to-be engaged one of the pulling hooks or cables of the device. In the present instances the pulling hook is shown as comprisingv a straight bar 18 of iron or of other suitable metal having a double hook, one hook 19 being engaged with ring 16 and the To this endthe in-'. vention includes a compressed air cylinder.

other hook 20 being adapted to engage over the side of the car, as shown in Figure 1. It is, however,.obvious that bar 18 may be replaced by a cable of any desired len 11, provided with additional hooks space at intervals to take up the slack on long pulls.

At the opposite end of the cylinder, the

cylinder head 15 is provided with a bearing 21 and a packing gland 22 through whic the plunger rod 23 is adapted to'slide. At its inner end, rod 23 carries the plunger 24, and at its outer endis provided with a hook 25 adapted to be engaged with the opposite side of the car, asshown in Figure. 1. Inwardly of the cylinderhead 15, the barrel 13 is provided on one side with an air inlet 26 and on the opposite side with an outlet opening 27 in which isscrewcd the exhaust valve 28. Plunger 24 is normally posi-' tioned at the valved end of the cylinder by reason of a helically coiled spring 32 arranged between the cylinder he'ad 14 and the adjacent face of the plunger.

Compressed air for operating the device is obtained from a suitable sup 1y line 28 to which is connected a flexible tin ofi' the feed of air to the device when so desired. At its opposite end, the hose 29 is.

provided with a threaded nipple 31, which 15 adapted to be threadedly engaged in the,

' the sldes of the car.

inlet opening 26 of the cylinder Hence, when the device is set up in operative position, with the hooks and engaged over the sides of the car to berepaired, and ownpressed air is admitted into the cylinder by way of opening 26, the pressure against plunger 24 andcylinder head 15 will cause the plunger and the cylinder to be moved relative to each other so that the hooks are drawn inwardly, thereby drawing together \Vhen the sides have been pulled in the desired extent, valve' 28 is opened to permit escape of air from the cylinder and thereby release the pressure therein. v

From the foregoing it will be apparent that the compressed-air operated deviceprovided by this invention offers a more convenient and efficient tool than the hand-operated screw devices in use at the present time for re-bending or straightening the sides of railway cars which have become distorted or bent out of shape. It is also apparent that the present invention is adapted to be applied with various modifications and alterations and itis, therefore, to be understood that nnnor changes in matters of construction and arrangement of the parts, etc., may

cured to the said ring and its other end adapted to be hooked over the side of the car for anchoring the cylinder thereto, a plunger rod slidably supported in, the said stufling box and having its outer end provided with a hook adapted to be engaged with the opposite side of the car, a plunger at the inner end of the said plunger rod, :1

spring in expansion between the face of the plunger and the adjacent end of the cylinder and means for introducing fluid pressure into the cylinder and rearwardly of the plunger for moving the latter inwardly against the action of the said spring for drawing together the sides of the car.

In testimony whereof I aflix my signature.

ROBERT A. MAXEY. 

